Specifications

13-26 IGMP Snooping Commands
Table 13-5 Output for show igmp statistics
Output What It Displays...
IGMP statistics for vlan VLAN name. Statistics are listed separately for each VLAN.
IGMP message type Type of IGMP message:
• General-Queries—General group membership queries sent by the
multicast querier (multicast router or pseudo-querier).
• GS-Queries—Group-specific queries sent by the the multicast querier to
determine whether there are receivers for a specific group.
• Report V1—IGMP version 1 group membership reports sent by clients
who want to be receivers for the groups.
• Report V2—IGMP version 2 group membership reports sent by clients
who want to be receivers for the groups.
• Leave—IGMP version 2 leave messages sent by clients who want to stop
receiving traffic for a group. Leave messages apply only to IGMP version
2.
• Mrouter-Adv—Multicast router advertisement packets. A multicast router
sends this type of packet to advertise the IP address of the sending
interface as a multicast router interface.
IGMP message type Type of IGMP message, continued:
• Mrouter-Term—Multicast router termination messages. A multicast router
sends this type of message when multicast forwarding is disabled on the
router interface, the router interface is administratively disabled, or the
router itself is gracefully shutdown.
• Mrouter-Sol—Multicast router solicitation messages. A multicast client or
a RoamAbout switch sends this type of message to immediately solicit
multicast router advertisement messages from the multicast routers in the
subnet.
• DVMRP—Distance Vector Multicast Routing Protocol (DVMRP)
messages. Multicast routers running DVMRP exchange multicast
information with these messages.
• PIM V1—Protocol Independent Multicast (PIM) version 1 messages.
Multicast routers running PIMv1 exchange multicast information with
these messages.
• PIM V2—PIM version 2 messages.
Received Number of packets received.
Transmitted Number of packets transmitted. This number includes both multicast packets
originated by the RoamAbout switch and multicast packets received and then
forwarded by the switch.
Dropped Number of IGMP packets dropped by the RoamAbout switch.
Topology notifications Number of Layer 2 topology change notifications received by the RoamAbout
switch.
Note: In the current software version, the value in this field is always 0.
Packets with unknown
IGMP type
Number of multicast packets received with an unrecognized multicast type.
Packets with bad length Number of packets with an invalid length.